/Engine/Source/Runtime/Engine/Public/SkeletalRenderPublic.h
vertex factory for rendering the LOD, 0 to suppress rendering
const [FVertexFactory](API\Runtime\RenderCore\FVertexFactory) * GetSkinVertexFactory ( const [FSceneView](API\Runtime\Engine\FSceneView) * View, int32 LODIndex, int32 ChunkIdx, ESkinVertexFactoryMode VFMode ) const